Flashcards in Forearm Deck (37):
Most important ligaments of radioulnar joint?
Triangular fibrocartilage complex components?
1) dorsal and volar radioulnar ligament
2) articular disc
3) prestyloid process
4) meniscus homolog
5) ulnar collateral ligament
What joint is Listers tubercle level with?
Tennis elbow, primary muscle involved?
Radial nerve runs bt which 2 muscles above the elbow?
Brachialis and brachioradialis
PIN splits what muscle?
PIN supplies all extensors EXCEPT?
The superficial branch of radial n passes to the dorsal radial surface of hand in the distal 1/3 of the forearm by passing bt which 2 muscles?
Brachioradialis (deep to) and ECRL
Median n superficial to which muscle at the elbow?
Median n splits what muscle?
The 2 heads of the pronator teres
Median n runs bt which 2 muscles in the forearm?
FDS and FDP
Median supplies all flexors EXCEPT?
AIN runs bt which 2 muscles?
FPL and FDP
AIN supplies what?
All deep flexors EXCEPT the ulnar half of FDP
Where does the ulnar n enter the forearm?
Between 2 heads of FCU
Ulnar n runs bt what 2 muscles in forearm?
FCU and FDP
Where does ulnar n enter the hand?
Lateral antebrachial cutaneous n passes lateral to what vein and emerges laterally bt what 2 muscles at the elbow?
1) Cephalic vein
2) biceps and brachialis
Posterior antebrachial cutaneous n a branch of what n?
Which muscle is the last to return to function after PIN compression?
The most distally innervated (extensor indicis proprius)
2) extensor carpi ulnaris
3) extensor digitorum
4) extensor digiti minimi
8) extensor indicis proprius
Cubital fossa borders?
1) 2 epicondyles
3) pronator teres
4) overlies the brachialis and supinator
Radial artery runs on what muscle?
Radial artery is deep to what muscle?
Proximally, the ulnar a is covered by what muscles?
Superficial flexors (bt FDS and FDP)
Distally, the ulnar a lies on what muscle?
FDP (bt tendons of FCU and FDS)
Forearm branches of the ulnar artery?
1) anterior and posterior recurrent ulnar
2) common interosseous
3) muscular and nutrient arteries
Approaches to the forearm?
1) Anterior (Henry's)
2) Dorsal posterior (Thompson's)
Anterior (Henry's) interval?
1) brachioradialis (radial n)
2) pronator teres or FCR distally (median n)
How do you protect the PIN during Henry's approach?
Supination (displaces it ulnarly)
Where does the radial artery enter the wrist?
Between brachioradialis and FCR
What must you ligate during the Henry's approach?
Leash of Henry (radial artery branches)
Risks of Henry's approach?
1) superficial branch of radial n
2) radial artery proximally
3) PIN during deep dissection of proximal exposure
Dorsal/posterior (Thompson's) approach interval?
1) ECRB (radial n)
2) extensor digitorum or EPL distally (PIN)
Risk during Thompson's approach and how to avoid it?
PIN--avoid excessive retraction of supinator
Ulnar approach interval?
1) ECU (PIN)
2) FCU (ulnar n)